Hello,

I want to find a map of the us coast line that shows where the
international waters begin.

Regards,

Juan A. Figueroa.

I'm not sure about a map, but the CIA world factbook
(http://www.cia.gov/cia/publications/factbook/geos/us.html) lists the
"Territorial Sea" for the US at 12 nautical miles.

The Territorial Sea is: territorial sea - the sovereignty of a coastal
state extends beyond its land territory and internal waters to an
adjacent belt of sea, described as the territorial sea in the UNCLOS
(Part II); this sovereignty extends to the air space over the
territorial sea as well as its underlying seabed and subsoil; every
state has the right to establish the breadth of its territorial sea up
to a limit not exceeding 12 nautical miles; the normal baseline for
measuring the breadth of the territorial sea is the low-water line
along the coast as marked on large-scale charts officially recognized
by the coastal state; the UNCLOS describes specific rules for
archipelagic states. (ibid)

Here are the listings for other nations:
http://www.cia.gov/cia/publications/factbook/fields/2106.html